Cadmium(II)-Organic Frameworks Containing the 1,3-Bis(2-methylimidazolyl)propane Ligand

The crystal structures of two new isoreticular metal-organic frameworks [Cd 3 (Bdc-X) 3 (Bmip) 2 ] (X = Br, Bdc-Br 2− is 2-bromoterephthalate anion ( I ); X = NO 2 , Bdc- is 2-nitroterephthalate anion ( II ); Bmip is 1,3-bis(2-methylimidazolyl)propane) are determined by the single-crystal X-ray diffraction method. Compounds I and II contain trinuclear carboxylate building blocks {Cd 3 (COO) 6 N 4 } in which the cadmium atoms are coordinated by the donor nitrogen atoms of the Bmip ligands to form nonporous three-dimensional frameworks (CIF files CCDC nos. 2126695 ( I ) and 2126696 ( II )). Compound I is characterized by powder X-ray diffraction, IR spectroscopy, and elemental CHN and thermogravimetric analyses. The sorption characteristics are studied and the luminescence spectra are obtained for compound I .